CALLISTO

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CALLISTO
Double - Heterodyne - Frequency Agile - Radio -
Spectrometer
ERAC Symposium Heppenheim Sep 5/6/7th 2003 Meyer
Hansueli ETH Zürich
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Directory

• RISC system or PC
• RISC microcontroller ATmega16
• Callisto interfaces
• Development board
• C Compiler
• Overview

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RISC system or PC
RISC processor
PC

• Low weight
• Cheap
• Low Power consumption
• Mobility
• Easy Interrupt/timer controlling
• Including ADCs
• Including different bus systems (SPI, I2C and
  Microwire)

• Higher weight
• More expensive
• Higher power consumption
• Stationary
• Difficult to handle interrupts and system
  processes

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RISC microcontroller ATmega16

• Low-power AVR 8-bit Microcontroller
• advanced RISC Architecture
• Up to 16 MIPS Throughput at 16 MHz
• 16K Bytes of In-System Self-Programmable Flash
• 512 Bytes internal EEPROM
• 1K Byte Internal SRAM
• 16bit Timer/Counters
• 8-channel, 10-bit ADC
• Programmable Serial USART
• Master/Slave SPI Serial Interface
• I2C bus Interface
• 32 Programmable I/O Lines
• Speed Grades 0 - 16 MHz

ATmega16 RISC processor
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Callisto interfaces
Antenna
Microcontroller ATmega16
RS232
I2C 12us/byte
Tuner0
Tuner1
SPI serial bus 15us/byte
Video to ADC
External EEPROM
Enviromental sensors
Up to 500 frequencies
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Development board STK 500

• Low cost starter kit
• Fully Assembled and Tested from Atmel
• Serial In-System Programming
• PC based software - Windows 95/98/NT
• RS-232 Interface to PC
• Sockets for 8-, 20-, 28-, and 40-pin AVR Devices
• LEDs and Push Buttons for Experimentation
• All AVR I/O Ports Easily Accessible through Pin
  Header Connectors

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C Compiler

• High Performance C Compiler, Integrated
  Development Environment
• Automatic Program Generator
• In-System Programmer for theAtmel AVR family of
  microcontrollers with internal RAM
• Modular programming in C

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Overview
Standard PC AVR C Compiler
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1
RCU (receiver control unit)
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Design board
RCU (receiver control unit)
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Thank you for your attention
Institute of Astronomy Meyer Hansueli ETH
Zentrum, SEC D3 Scheuchzerstrasse 7 CH-8092
Zürich meyerh_at_astro.phys.ethz.ch